#include<iostream>
#include"Sales_item.h"
int main()

{
  Sales_item book;
  std::cout<<"请输入销售记录："<<std::endl;
  while(std::cin>>book){
    std::cout<<"ISBN、售出本数、销售额和平均售价为:"
             <<book<<std::endl;
  }
  return 0;
}
